Mastodon - Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome!
Twicca - Twicca is a Twitter client for Android that is simply awesome. Features: * Notification
Gab - Gab is an ad-free social network dedicated to free speech.
Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.
Diaspora - The online social world where you are in control.
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.